Alert archive / Tennessee / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 21, NWS Morristown, TN

May 18, 2019Carter County, Unicoi County, Washington County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at May 18, 2019, 5:32 PM EDT for Carter County, Unicoi County, Washington County, Tennessee. It was in force for 43 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 18, 2019, 5:32 PM EDT (21:32 UTC)
Expired: May 18, 2019, 6:15 PM EDT
In force: 43 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Carter County, TN, Unicoi County, TN, Washington County, TN

The radar

The Knoxville radar (KMRX), 98 km from the middle of the area, began a volume at 21:32 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
May 18, 5:44 PM EDT	TSTM WND DMG	3 Wnw Milligan College, TN	TREE AND POWER LINE DOWN NEAR BUFFALO MOUNTAIN STATE PARK.
May 18, 5:45 PM EDT	HAIL 1	3 S Johnson City, TN
May 18, 6:01 PM EDT	TSTM WND DMG	2 S Johnson City, TN	TREE AND POWER LINE DOWN ON COLLEGE HEIGHTS ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 9.5 hours before the alert went out and 269 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 135 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 1133 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

505 
WUUS54 KMRX 182132
SVRMRX
TNC019-171-179-182215-
/O.NEW.KMRX.SV.W.0021.190518T2132Z-190518T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Morristown TN
532 PM EDT Sat May 18 2019

The National Weather Service in Morristown has issued a

* Severe Thunderstorm Warning for...
  Northeastern Washington County in east Tennessee...
  North central Unicoi County in east Tennessee...
  West central Carter County in east Tennessee...

* Until 615 PM EDT.

* At 532 PM EDT, a severe thunderstorm was located near Midway, or
  near Johnson City, moving north at 5 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Johnson City, Elizabethton, Jonesborough, Oak Grove, Central,
  Midway, Pine Crest, Unicoi, Watauga, Milligan College and Hunter.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3619 8233 3624 8246 3644 8244 3644 8241
      3642 8241 3643 8239 3642 8238 3642 8237
      3639 8238 3640 8237 3640 8229 3642 8224
      3640 8220 3641 8216
TIME...MOT...LOC 2132Z 197DEG 7KT 3628 8237 

HAIL...1.00IN
WIND...60MPH
 
$$

CDG

2 follow-up statements

724 
WWUS54 KMRX 182145
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
545 PM EDT Sat May 18 2019

TNC171-182155-
/O.CAN.KMRX.SV.W.0021.000000T0000Z-190518T2215Z/
Unicoi TN-
545 PM EDT Sat May 18 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL UNICOI COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3626 8231 3626 8232 3625 8235 3626 8245
      3644 8244 3644 8241 3642 8241 3643 8239
      3642 8238 3642 8237 3639 8238 3640 8237
      3640 8229 3642 8224
TIME...MOT...LOC 2145Z 191DEG 7KT 3630 8237 

$$

TNC019-179-182215-
/O.CON.KMRX.SV.W.0021.000000T0000Z-190518T2215Z/
Washington TN-Carter TN-
545 PM EDT Sat May 18 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHEASTERN WASHINGTON AND WEST CENTRAL CARTER COUNTIES...

At 545 PM EDT, a severe thunderstorm was located over Johnson City,
moving north at 5 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Johnson City, Elizabethton, Jonesborough, Oak Grove, Central, Midway,
Pine Crest and Watauga.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3626 8231 3626 8232 3625 8235 3626 8245
      3644 8244 3644 8241 3642 8241 3643 8239
      3642 8238 3642 8237 3639 8238 3640 8237
      3640 8229 3642 8224
TIME...MOT...LOC 2145Z 191DEG 7KT 3630 8237 

HAIL...1.00IN
WIND...60MPH
 
$$

CDG

893 
WWUS54 KMRX 182201
SVSMRX

Severe Weather Statement
National Weather Service Morristown TN
601 PM EDT Sat May 18 2019

TNC019-182210-
/O.CAN.KMRX.SV.W.0021.000000T0000Z-190518T2215Z/
Carter TN-
601 PM EDT Sat May 18 2019

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL CARTER COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3628 8233 3629 8242 3642 8241 3643 8239
      3642 8238 3642 8237 3641 8237 3640 8239
      3639 8238 3640 8237 3640 8230 3636 8230
TIME...MOT...LOC 2200Z 190DEG 4KT 3632 8237 

$$

TNC179-182215-
/O.CON.KMRX.SV.W.0021.000000T0000Z-190518T2215Z/
Washington TN-
601 PM EDT Sat May 18 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHEASTERN WASHINGTON COUNTY...

At 600 PM EDT, a severe thunderstorm was located over Johnson City,
and is nearly stationary.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Johnson City, Midway, Pine Crest, Central and Watauga. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3628 8233 3629 8242 3642 8241 3643 8239
      3642 8238 3642 8237 3641 8237 3640 8239
      3639 8238 3640 8237 3640 8230 3636 8230
TIME...MOT...LOC 2200Z 190DEG 4KT 3632 8237 

HAIL...1.00IN
WIND...60MPH
 
$$

CDG

The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 18, 4:40 PM EDT	Special Weather Statement	MRX	Monroe	50 min
May 18, 5:16 PM EDT	Special Weather Statement	MRX	Carter	44 min
May 18, 5:28 PM EDT	Special Weather Statement	MRX	Monroe	47 min
May 18, 5:38 PM EDT	Special Weather Statement	MRX	Blount	52 min
May 18, 5:44 PM EDT	Severe Thunderstorm Warning	MRX	Blount	46 min
May 18, 5:51 PM EDT	Severe Thunderstorm Warning	MRX	Blount	39 min
May 18, 6:14 PM EDT	Special Weather Statement	MRX	Knox	46 min
May 18, 6:17 PM EDT	Special Weather Statement	MRX	Sullivan	43 min
May 18, 6:21 PM EDT	Special Weather Statement	MRX	Sevier	54 min
May 18, 6:34 PM EDT	Severe Thunderstorm Warning	MRX	Knox, Sevier	41 min
May 18, 6:44 PM EDT	Special Weather Statement	MRX	Cocke	46 min
May 18, 6:52 PM EDT	Special Weather Statement	MRX	Hamblen	38 min
May 18, 6:55 PM EDT	Special Weather Statement	MRX	Jefferson	50 min
May 18, 6:58 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Knox, Union	47 min
May 18, 7:03 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Greene	42 min
May 18, 7:04 PM EDT	Special Weather Statement	MRX	Anderson	41 min
May 18, 7:14 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Washington	46 min
May 18, 7:16 PM EDT	Special Weather Statement	MRX	Hamblen	59 min
May 18, 7:24 PM EDT	Special Weather Statement	MRX	Greene	66 min
May 18, 7:34 PM EDT	Special Weather Statement	MRX	Grainger	41 min
May 18, 7:44 PM EDT	Special Weather Statement	MRX	Hamblen	46 min
May 18, 7:56 PM EDT	Special Weather Statement	MRX	Hawkins	49 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2019 Every severe thunderstorm warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.